In this paper we show how orthogonality constraints for DSCDMA spreading sequences yield directly to OFDM sequences. Having shown this duality we do a comparison of performances between these two waveforms in a multipath fading channel context. The comparison includes the MC-CDMA approach. We show how the cyclic prefix solution can be used for DSCDMA in order to propose an MMSE optimal despread...

A novel cyclic-prefix based delay-spread estimation technique for wireless OFDM systems is proposed. In particular, the authors propose a technique for estimating the delays and powers of multipath components when the channel is sparse, i.e. a few strong multipaths distantly spaced in time, and a technique for estimating the RMS delay-spread when the channel has a large number of sample-spaced ...

Future mobile communications is required to provide data transmission with higher rates and more reliability than current systems. As a solution to this problem, the diversity transmission using Alamouti’s space time block coding (STBC)[1] has been adopted in several wireless standard due to its attractive features such as full spatial diversity at full transmission rate. Usually, it requires c...

Healthcare organizations are facing the challenge of delivering personalized services to their patients in a cost-effective and efficient manner. This, in turn, requires advanced IT support for healthcare processes covering both organizational procedures and knowledge-intensive, dynamic treatment processes. Nowadays, required agility is often hindered by a lack of flexibility in hospital inform...

Strategic alignment between business and information technology (IT) is considered key to maximizing IT impact. Nonetheless, only seldom have exceptional achievements in performance been studied from the viewpoint of the Strategic Alignment Model (SAM). This paper describes a longitudinal case study of a Health Maintenance Organization (HMO), named here MHMO, which serves over 1.7 million membe...

Wireless communication networks offer subscribers the possibilities of free mobility and access to information anywhere at any time. Therefore, electromagnetic coverage calculations are important for wireless mobile communication systems, especially in Wireless Local Area Networks (WLANs). Before any propagation computation is performed, modeling of indoor radio wave propagation needs accurate ...

Although business process management ( ̳BPM‘) is a popular concept, it has not yet been properly theoretically grounded. This leads to problems in identifying both generic and case specific critical success factors of BPM programs. The paper proposes an underlying theoretical framework with the utilization of three theories: contingency, dynamic capabilities and task technology fit. The main pre...

Traditional construction methods of domain ontology usually have following two limits. First, these methods usually depend on some high cost resources. Second, these methods are easily to result in error propagation because of the errors introduced in the concept identification step. In this paper we present a demo that constructs domain ontology with an easy method. And three main features dis...

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original article     the aim of this study was to design and build a software for noise propagation prediction (indoor and from indoor to outdoor spaces) which is being commonly used in industry.  in this regard, firstly a mathematical complex model was created based on existing relationships about noise propagation in indoor spaces and transmission through the walls and propagation in outdoor ...